|Biome||Temperate coniferous forest|
|Area||140,900 km2 (54,400 sq mi)|
|Climate type||Humid subtropical|
The Piney Woods is a temperate coniferous forest terrestrial ecoregion in the Southern United States covering 54,400 square miles (141,000 km2) of East Texas, southern Arkansas, western Louisiana, and southeastern Oklahoma. These coniferous forests are dominated by several species of pine as well as hardwoods including hickory and oak. Historically the most dense part of this forest region was the Big Thicket though the lumber industry dramatically reduced the forest concentration in this area and throughout the Piney Woods during the 19th and 20th centuries. The World Wide Fund for Nature considers the Piney Woods to be one of the critically endangered ecoregions of the United States. The United States Environmental Protection Agency (EPA) defines most of this ecoregion as the South Central Plains.
The Piney Woods cover a 54,400-square-mile (141,000 km2) area of eastern Texas, northwestern Louisiana, southwestern Arkansas and the southeastern corner of Oklahoma. They are bounded on the east by the Mississippi lowland forests, on the south by the Western Gulf coastal grasslands, on the west by the East Central Texas forests and the Texas blackland prairies, on the northwest by the Central forest-grasslands transition, and on the north by the Ozark Mountain forests. They receive 40–52 inches (1,000–1,300 mm) of precipitation annually.
The region has heavy to moderate rainfall, with some places receiving over 60 in (1,500 mm) of rain per year. Longleaf, shortleaf, and loblolly pines, along with bluejack and post oaks, dominate sandhills. A well-developed understory grows beneath the sparse canopy, and includes yaupon holly and flowering dogwood. Pine savannas consist of scattered longleaf and loblolly pines alongside black tupelos, sweetgums, and in acid soils along creeks sweetbay magnolias. Other common trees in this ecoregion include eastern redbud, red maple, southern sugar maple, and American elm. American wisteria, a vine, may cover groves of trees.
Two varieties of wetlands are common in the Piney Woods: bayous are generally found near rivers and sloughs are generally found near creeks. In bayous bald cypress, Spanish moss, and water lilies are common plants. Sloughs are shallow pools of standing water that most trees are not capable of growing in. Other species, such as the purple bladderwort, a small carnivorous plant, have found niches in sloughs. A baygall is another type of wetland found the Piney Woods and other forest of the Gulf Coast states in the USA.
Hardy species of prickly pear cactus and yucca can be found in the forests where deep sands occur. 
The indigenous Texas trailing phlox (Phlox nivalis texensis), an endangered species, grows in the sandy soils of longleaf pine forests.
Farm to Market Road 315, Anderson County, Texas (April 2017)
Angelina National Forest, Angelina County, Texas (November 2020)
Angelina National Forest, Angelina County, Texas, (November 2020)
Bladderwort (Utricularia sp.) in bloom, Cass County, Texas, (April 2017)
Big Cypress Bayou, Caddo Lake State Park, Harrison County, Texas, (April 2017)
Bald cypress (Taxodium distichum), Caddo Lake State Park, Harrison County, Texas (April 2017)
Davy Crockett National Forest, Houston County, Texas, USA (May 2019)
Sam Houston National Forest, San Jacinto County, Texas (October 2017)
Longleaf pine (Pinus palustris), Sam Houston National Forest, Walker County, Texas (September 2020)
Dwarf palmettos (Sabal minor), Sam Houston National Forest, Walker County, Texas (May 2012)
Peach Creek, Lake Houston Wilderness Park, Montgomery County, Texas (May 2013)
Louisiana yucca (Yucca louisianensis), Roy E. Larsen Sandyland Sanctuary, Hardin County, Texas (November 2019)
Woodland pond, Big Thicket National Preserve, Polk County, Texas, (May 2020)
Long-leaf pine uplands, Big Thicket National Preserve, Polk County, Texas (May 2020)
Long-leaf pine savannah wet-lands with pitcher plants (Sarracenia alata) in foreground, Tyler County, Texas (May 2020)
Long-leaf pine uplands, Big Thicket National Preserve, Tyler County, Texas, (August 2020)
Big Thicket National Preserve, Hardin County, Texas (May 2020).
Neches River, Orange County, Texas (October 2016)
Mammals: Common species in the Piney Woods include White-tailed deer (Odocoileus virginianus), Virginia opossum (Didelphis virginiana), northern raccoon (Procyon lotor), striped skunk (Mephitis mephitis), eastern mole (Scalopus aquaticus), least shrew (Cryptotis parva), eastern gray squirrel (Sciurus carolinensis), eastern fox squirrel (Sciurus niger), and eastern cottontail (Sylvilagus floridanus). Somewhat less common are the northern river otter (Lontra canadensis), bobcat (Lynx rufus), gray fox (Urocyon cinereoargenteus), southern short-tailed shrew (Blarina carolinensis), North American beaver (Castor canadensis), and swamp rabbit (Sylvilagus aquaticus). Some carnivores such as the eastern spotted skunk (Spilogale putorius), ringtail (Bassariscus astutus), long-tailed weasel (Mustela frenata), American mink (Mustela vison), and red fox (Vulpes vulpes), are uncommon, rarely seen, and in decline. Over a dozen species of bats occur in the region, some migratory like the Brazilian free-tailed bat (Tadarida brasiliensis) and silvered-haired bat (Lasionycteris noctivagans), others are year round residents like the Seminole bat (Lasiurus seminolus), evening bat (Nycticeius humeralis), Rafinesque's big-eared bat (Corynorhinus rafinesquii), a threatened species in Texas. Rodents found in the Piney Woods include the southern flying squirrel (Glaucomys volans), common muskrat (Ondatra zibethicus), Baird's pocket gopher (Geomys breviceps), woodland vole (Microtus pinetorum), and about 10 additional native rats and mice.
Several of the larger carnivores that once occurred in the Piney Woods are entirely extirpated, including the hog-nosed skunk (Conepatus leuconotus), red wolf (Canis rufus), jaguar (Panthera onca), and ocelot (Leopardus pardalis). The mountain lion (Puma concolor) and black bear (Ursus americanus) have also been extirpated from most areas; however, very rare sightings or remains are occasionally documented, likely representing wandering individuals rather than breeding populations. Stable populations of black bears occur in adjacent areas north and east of the Piney Woods and they appear to be slowly increasing in numbers and dispersing. As of 2020, however, the black bear is largely extirpated from most quarters, and rare in peripheral areas. With the clearing of forest and decline of the native predators (or competitors), the nine-banded armadillo (Dasypus novemcinctus), coyotes (Canis latrans), and black-tailed jackrabbit (Lepus californicus) have expanded their ranges eastward into the region. Other species have been introduced into the region such as the nutria or coypu (Myocastor coypus), house mouse (Mus musculus), roof rat (Rattus rattus), and Norway rat (Rattus norvegicus). Feral house cats (Felis catus) and feral pigs (Sus scrofa) pose threats to native fauna and are serious conservation concerns.
Birds: With some species migrating through in the spring and fall, others nesting in the spring and summer months, and still others wintering in the region, well over 300 species of birds occur in the Piney Woods. A few of the many year round residents include the wood duck (Aix sponsa), black vulture (Coragyps atratus), red-shouldered hawk (Buteo lineatus), American kestrel (Falco sparverius), wild turkey (Meleagris gallopavo), northern bobwhite (Colinus virginianus), American woodcock (Scolopax minor), greater roadrunner (Geococcyx californianus), red-cockaded woodpecker (Picoides borealis), loggerhead shrike (Lanius ludovicianus), northern mockingbird (Mimus polyglottos), brown thrasher (Toxostoma rufum), Carolina chickadee (Poecile carolinensis), brown-headed nuthatch (Sitta pusilla), pine warbler (Dendroica pinus), Bachman's sparrow (Aimophila aestivalis), and fish crow (Corvus ossifragus). Many additional species migrate from regions south and nest in the Piney Woods in the spring and summer, such as the anhinga (Anhinga anhinga), yellow-crowned night-heron (Nyctanassa violacea), little blue heron (Egretta caerulea), snowy egret (Egretta thula), purple gallinule (Porphyrula martinica), Chuck-will's-widow (Caprimulgus carolinensis), scissor-tailed flycatcher (Tyrannus forficatus), prairie warbler (Dendroica discolor), Swainson's warbler (Limnothlypis swainsonii), and painted bunting (Passerina ciris). Conversely, a different assemblage of birds migrate from the north to spend the winters months in the region, including the Canada goose (Branta canadensis), ring-necked duck (Aythya collaris), hooded merganser (Lophodytes cucullatus), blue-headed vireo (Vireo solitarius), Henslow's sparrow (Ammodramus henslowii), Le Conte's Sparrow (Ammodramus leconteii), and Smith's longspur (Calcarius pictus). A few species that once occurred in the region are now extinct like the passenger pigeon (Ectopistes migratorius), Carolina parakeet (Conuropsis carolinensis), ivory-billed woodpecker (Campephilus principalis), and Bachman's warbler (Vermivora bachmanii).
Little blue heron (Egretta caerulea), Fort Bend County, Texas, USA (October 2020)
Red-shouldered hawk (Buteo lineatus), locality unknown (August 2019)
American woodcock (Scolopax minor) Essex, Ontario, Canada (March 2017)
Red-cockaded woodpecker (Picoides borealis), Louisiana, USA (January 2017)
Scissor-tailed flycatcher (Tyrannus forficatus) Walker County, Texas, USA (April 2014)
Henslow's sparrow (Ammodramus henslowii), Butler County, Ohio, USA (October 2016)
Reptiles: The American alligator (Alligator mississippiensis) ranges throughout all but the northwestern most area of the region, however they are not particularly common in the forested habitat compared to their abundance in the open marshlands and prairies to the south. The Sabine map turtle (Graptemys sabinensis) is endemic: and among the many other turtles found in the region are the alligator snapping turtle (Macrochelys temminckii), chicken turtle (Deirochelys reticularia), false map turtle (Graptemys pseudogeographica), river cooter (Pseudemys concinna), three-toed box turtle (Terrapene triunguis), eastern mud turtle (Kinosternon subrubrum), razor-backed musk turtle (Sternotherus carinatus), and spiny softshell turtle (Apalone spinifera). Lizards occurring in the Piney Woods include the green anole (Anolis carolinensis), six-lined racerunner (Aspidoscelis sexlineatus), prairie lizard (Sceloporus conssbrinus), slender glass lizard (Ophisaurus attenuatus), and a number of skinks including the five-lined skink (Plestiodon fasciatus), broad-headed skink (Plestiodon laticeps), southern coal skink (Plestiodon anthracinus), and little brown skink (Scincella lateralis). Snake diversity is relatively high in the Piney Woods for a temperate area of its size, with well over 30 species ranging into the region. The Louisiana pinesnake (Pituophis ruthveni) is endemic and Slowinski’s cornsnake (Pantherophis slowinskii) is nearly endemic. Five venomous snakes occur in the region, the Texas coralsnake (Micrurus tener), eastern copperhead (Agkistrodon contortrix), northern cottonmouth (Agkistrodon piscivorus), timber rattlesnake (Crotalus horridus), and pygmy rattlesnake (Sistrurus miliarius). Some of the non-venomous snakes include the rough greensnake (Opheodrys aestivus), Dekay's brownsnake (Storeria dekayi), eastern hog-nosed snake (Heterodon platirhinos), western ribbonsnake (Thamnophis proximus), glossy swampsnake (Liodytes rigida), southern watersnake (Nerodia fasciata), diamond-back watersnake (Nerodia rhombifer), red-bellied mudsnake (Farancia abacura), North American racer (Coluber constrictor), coachwhip (Masticophis flagellum), scarletsnake (Cemophora coccinea), prairie kingsnake (Lampropeltis calligaster), speckled kingsnake (Lampropeltis holbrooki), western ratsnake (Pantherophis obsoletus). and at least a dozen others.
Sabine map turtle (Graptemys sabinensis), in situ, Orange County Texas. (October 2016).
Alligator snapping turtle (Macrochelys temminckii), aquarium display (2011)
Six-lined racerunner (Aspidoscelis sexlineatus), in situ, Hardin County, Texas (April 2020).
Southern coal skink (Plestiodon anthracinus), Jefferson Co, Missouri (March 2016)
Slowinski’s cornsnake (Pantherophis slowinskii), in situ, Colorado County, Texas (May 2018).
Louisiana pinesnake (Pituophis ruthveni), Louisiana, USA (April 2011)
Amphibians: Over a dozen species of salamanders occur in the Piney Woods. The Louisiana slimy salamander (Plethodon kisatchie) of northern Louisiana and adjacent areas of southern Arkansas is endemic to the region. The three-toed amphiuma (Amphiuma tridactylum), commonly growing 18 to 30 inches (46-76 cm.), and other species such as the Gulf Coast waterdog (Necturus beyeri), Red River mudpuppy (Necturus louisianensis), and western lesser siren (Siren intermedia) are entirely aquatic. Other salamanders include the spotted salamander (Ambystoma maculatum), marbled salamander (Ambystoma opacum), mole salamander (Ambystoma talpoideum), small-mouthed salamander (Ambystoma texanum), spotted dusky salamander (Desmognathus conanti), western dwarf salamander (Eurycea paludicola), and the eastern newt (Notophthalmus viridescens). Anurans (frogs and toads) found in the Piney Woods include Blanchard’s cricket frog (Acris blanchardi), Cope’s gray treefrog (Hyla chrysoscelis), green treefrog (Hyla cinerea), cajun chorus frog (Pseudacris fouquettei), spring peeper (Pseudacris crucifer), eastern narrow-mouthed toad (Gastrophryne carolinensis), Hurter’s spadefoot toad (Scaphiopus hurterii), American bullfrog (Lithobates catesbeianus), bronze frog (Lithobates clamitans), pickerel frog (Lithobates palustris), and southern leopard frog (Lithobates sphenocephalus). The American toad (Anaxyrus americanus) occurs in northern areas and the Gulf Coast toad (Incilius nebulifer) occurs in the south. The Fowler’s toad (Anaxyrus fowleri) ranges throughout Arkansas and Louisiana, but populations in east Texas intergraded with Woodhouse's toad (Anaxyrus woodhousii), however some regard the east Texas populations as a distinct species, the east Texas toad (Anaxyrus velatus).
Blanchard’s cricket frog (Acris blanchardi), Montgomery Co. TX (April 2014)
Green treefrog (Hyla cinerea), Montgomery Co. TX (April 2014)
Dwarf salamander (Eurycea [quadridigitata] paludicola) Polk Co. TX (April 2009)
Narrow-mouthed toad (Gastrophryne carolinensis), Chambers Co., TX (Sept 2018)
Eastern newt (Notophthalmus viridescens) Walker Co. TX (May 2012)
East Texas toad (Anaxyrus velatus), Hardin Co. TX (Oct 2019)
Gulf Coast waterdog (Necturus beyeri), St. Tammany Parish, Louisiana
Hurter's spadefoot Toad (Scaphiopus hurterii), Colorado Co., TX (May 2014)
Southern leopard frog (Lithobates sphenocephalus), Liberty Co. TX (April 2009)
Fish: The Piney Woods are rich in fish diversity. Fish occurring in the region include the chestnut lamprey (Ichthyomyzon castaneus), southern brook lamprey (Ichthyomyzon gagei), paddlefish (Polyodon spathula), alligator gar (Atractosteus spatula), spotted gar (Lepisosteus oculatus), bowfin (Amia calva), and redfin pickerel (Esox americanus). Some sport fish native to the Piney Woods include largemouth bass (Micropterus salmoides), spotted bass (Micropterus punctulatus), white bass (Morone chrysops), yellow bass (Morone mississippiensis), black crappie (Pomoxis nigromaculatus), white crappie (Pomoxis annularis), blue catfish (Ictalurus furcatus), channel catfish (Ictalurus punctatus), yellow bullhead (Ictalurus natalis), black bullhead (Ictalurus melas), redear sunfish (Lepomis microlophus), and longear sunfish (Lepomis megalotis). A multitude of smaller fish inhabit the waters of the Piney Woods. Endemics include the bluehead shiner (Pteronotropis hubbsi) and Creole darter (Etheostoma collettei). The western mosquitofish (Gambusia affinis), a species that has been widely introduced around the world and considered a pest in many areas, is a native in the Piney Woods. Just a few of the other small fish in the region include blacktail shiner (Cyprinella venusta), pallid shiner (Hybopsis amnis), blackspot shiner (Notropis atrocaudalis), peppered shiner (Notropis perpallidus), Sabine shiner (Notropis sabinae), weed shiner (Notropis texanus), blacktail redhorse (Moxostoma poecilurum), freckled madtom (Noturus nocturnus), brown madtom (Noturus phaeus), Blair's starhead topminnow (Fundulus blairae), golden topminnow (Fundulus chrysotus), blachspotted topminnow (Fundulus olivaceus), bantma sunfish (Lepomis symmetricus), scaly sand darter (Ammocrypta vivax), redspot darter (Etheostoma artesiae), mud darter (Etheostoma asprigene), harlequin darter (Etheostoma histrio), and goldstripe darter (Etheostoma parvipinne).
Creole darter (Etheostoma collettei) endemic to the Piney Woods, Saline River Drainage, Arkansas (March 2016).
Harlequin darter (Etheostoma histrio), Sabine River, Texas (September 2009).
Golden topminnow (Fundulus chrysotus) Mississippi (August 2014).
Blacktail Redhorse (Moxostoma poecilurum). Sabine River, Texas (September 2009).
Bantma sunfish (Lepomis symmetricus), Liberty County, TX (October 2019).
Bowfin (Amia calva), Steinhart Aquarium, San Francisco, California.
Alligator gar (Atractosteus spatula), Brazos River system, Texas (Nov. 2004).
Some endemic flora and fauna of the Piney Woods (threatened species: Federal++; State +: historical isolated Illinois population now extirpated = *).
The majority of the commercial timber growing and wood processing in the state of Texas takes place in the Piney Woods region, which contains about 50,000 square kilometres (12,000,000 acres) of commercial forestland.
One National Preserve, the Big Thicket National Preserve, in the southern part of the Texas portion of the Piney Woods region, currently consists of fourteen named, non-contiguous units scattered across a wide area bounded roughly by Pine Island Bayou in Hardin County, Texas to the south, the Neches River bottom to the east (units on both sides of the river), the Trinity River to the west and Steinhagen Reservoir to the north. The preserve contains ten distinct ecosystems according to the National Park Service. Big Thicket National Preserve is one of two UNESCO Biosphere Reserves in Texas. The preserve has also been listed as a Globally Important Bird Area by the American Bird Conservancy. The preserve was established in 1974 under 16 U.S. Code § 698 - Big Thicket National Preserve "...to assure the preservation, conservation, and protection of the natural, scenic, and recreational values of a significant portion of the Big Thicket area in the State of Texas..." Since the preserve's inception, the Conservation Fund has helped to increase the amount of protected acreage by 33,000 acres (13,000 ha).
United States Department of the Interior, National Park Service
United States Department of the Interior, U.S. Fish & Wildlife Service
United States Department of Agriculture, U. S. Forest Service Managed under a multiple-use concept (by law), balancing between timber harvesting, grazing, minerals, soil and water, fish and wildlife, recreation, and public needs, with no single resource emphasized to the detriment of others.
(only two Ouachita N.F. units in southern Oklahoma are in the Piney Woods).
Arkansas (See also List of Arkansas state parks)
Louisiana Department of Wildlife and Fisheries
Texas Parks and Wildlife Department (Some Texas Wildlife Management Areas leased from the U. S. Forest Service and located within National Forest are not included here)
The Piney Woods Region of the four state area is a noted area for Bigfoot (Sasquatch) sightings; with many legends dating back to pre European settlement. One such noted legend is the story of the Fouke Monster of Southern Arkansas; documented in the 1972 film The Legend of Boggy Creek. The area according to references lists this area to be the third highest in North America for these such sightings.
Melanistic (black) cougars, another probable cryptid, have been noted by residents.